Recently, I received an email from Blizzard offering me to pre-purchase Heart of the Swarm expansion to StarCraft 2: Wings of Liberty. Is there any benefit to pre-purchasing as opposed to buying it after it's released?

Hello, Ansis, and welcome to gaming! Unfortunately, questions about shopping suggestions and recommendations are considered off-topic for our site. As such, I've altered your question a bit (though if you want to discuss the relative pros/cons, you can surely join us in Arqade Chat!
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Raven Dreamer♦Nov 25 '12 at 13:21